Note that this jam will NOT include a 1 hour grace period for people who didn't get their game properly submitted before time. This means that it is extra important you leave proper time to submit your game. Game files are not locked so if you discover a major issue with your game file it is possible to change this afterwards, just make sure you make a submission before the deadline. This is only for game-breaking issues, don't use this feature to otherwise update your game before the rating period is over.
